Using the component, you can setup different redirections for different user groups, set expirations for the redirection, choose to only redirect the user once (if you have a special announcement or something), and set the priority for the redirection in relation to other redirections that have been setup ...

go to file
modules/mod_cblogin/mod_cblogin.php
Find line the below line
$login = $params->get( 'login', $return );
Replace this line with
$login = $params->get( 'login', "index.php?option=com_contact" );
OR ANY LINK YOU WANT
Thanks

go to file
modules/mod_cblogin/mod_cblogin.php
Find line the below line
$login = $params->get( 'login', $return );
Replace this line with
$login = $params->get( 'login', "index.php?option=com_contact" );
OR ANY LINK YOU WANT................